Derivative Instruments and Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

Derivatives not designated as hedging instruments:

As of December 31, 2014
	Asset		Liability
Type of  Futures,	Derivatives		Derivatives				Net
Forwards Contracts	Fair Value		Fair Value				Fair Value
Agriculture	$	119,669		$	(95,121	)		$	24,548
Currency		60,876			(31,502	)			29,374
Energy		218,011			(15,424	)			202,587
Indices		12,875			(13,050	)			(175	)
Interest Rates		168,536			(2,275	)			166,261
Metals		44,235			(875	)			43,360
	$	624,202		$	(158,247	)		$	465,955

As of December 31, 2013
	Asset		Liability
Type of	Derivatives		Derivatives				Net
Futures Contracts	Fair Value		Fair Value				Fair Value
Agriculture	$	223,192		$	(37,817	)		$	185,375
Currency		94,958			(1,663	)			93,295
Energy		15,843			(38,517	)			(22,674	)
Indices		438,814			(46,548	)			392,266
Interest Rates		129,505			(94,051	)			35,454
Metals		78,920			-				78,920
	$	981,232		$	(218,596	)		$	762,636

Schedule of Derivative Instruments Included in Trading Activities [Table Text Block]

Trading gain (loss) for the following periods:

	Year ended December 31,
Type of Futures Contracts	2014			2013			2012
Agriculture	$	(42,004	)	$	441,400		$	(361,619	)
Currency		790,640			(221,046	)		(598,618	)
Energy		126,535			(430,320	)		(483,184	)
Indices		(566,210	)		394,694			(655,571	)
Interest Rates		188,370			(204,765	)		162,682
Metals		21,168			229,275			(462,793	)
	$	518,499		$	209,238		$	(2,399,103	)